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Commit 5ac385d8 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

Merge tag 'efi-urgent' of... 

Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi

 into x86/urgent

Pull EFI fixes from Matt Fleming:

  * Fix early boot regression affecting x86 EFI boot stub when loading
    initrds above 4GB - Yinghai Lu

  * Relocate GOT entries in the x86 EFI boot stub now that we have
    symbols with global visibility - Matt Fleming

  * fdt memory reservation fix for arm64 - Mark Salter

Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parents cc99535e 0ceac9e0

arch/arm64/mm/init.c

+1 −2
Original line number Diff line number Diff line
@@ -149,7 +149,6 @@ void __init arm64_memblock_init(void) 
		memblock_reserve(__virt_to_phys(initrd_start), initrd_end - initrd_start);

#endif



	if (!efi_enabled(EFI_MEMMAP))

	early_init_fdt_scan_reserved_mem();



	/* 4GB maximum for 32-bit only capable devices */

arch/x86/boot/compressed/eboot.c

+11 −7
Original line number Diff line number Diff line
@@ -1032,7 +1032,6 @@ struct boot_params *make_boot_params(struct efi_config *c) 
	int i;

	unsigned long ramdisk_addr;

	unsigned long ramdisk_size;

	unsigned long initrd_addr_max;



	efi_early = c;

	sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
@@ -1095,15 +1094,20 @@ struct boot_params *make_boot_params(struct efi_config *c) 


	memset(sdt, 0, sizeof(*sdt));



	if (hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G)

		initrd_addr_max = -1UL;

	else

		initrd_addr_max = hdr->initrd_addr_max;

	status = handle_cmdline_files(sys_table, image,

				      (char *)(unsigned long)hdr->cmd_line_ptr,

				      "initrd=", hdr->initrd_addr_max,

				      &ramdisk_addr, &ramdisk_size);



	if (status != EFI_SUCCESS &&

	    hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G) {

		efi_printk(sys_table, "Trying to load files to higher address\n");

		status = handle_cmdline_files(sys_table, image,

				      (char *)(unsigned long)hdr->cmd_line_ptr,

				      "initrd=", initrd_addr_max,

				      "initrd=", -1UL,

				      &ramdisk_addr, &ramdisk_size);

	}



	if (status != EFI_SUCCESS)

		goto fail2;

	hdr->ramdisk_image = ramdisk_addr & 0xffffffff;

arch/x86/boot/compressed/head_32.S

+40 −14
Original line number Diff line number Diff line
@@ -30,6 +30,33 @@ 
#include <asm/boot.h>

#include <asm/asm-offsets.h>



/*

 * Adjust our own GOT

 *

 * The relocation base must be in %ebx

 *

 * It is safe to call this macro more than once, because in some of the

 * code paths multiple invocations are inevitable, e.g. via the efi*

 * entry points.

 *

 * Relocation is only performed the first time.

 */

.macro FIXUP_GOT

	cmpb	$1, got_fixed(%ebx)

	je	2f



	leal	_got(%ebx), %edx

	leal	_egot(%ebx), %ecx

1:

	cmpl	%ecx, %edx

	jae	2f

	addl	%ebx, (%edx)

	addl	$4, %edx

	jmp	1b

2:

	movb	$1, got_fixed(%ebx)

.endm



	__HEAD

ENTRY(startup_32)

#ifdef CONFIG_EFI_STUB
@@ -56,6 +83,9 @@ ENTRY(efi_pe_entry) 
	add	%esi, 88(%eax)

	pushl	%eax



	movl	%esi, %ebx

	FIXUP_GOT



	call	make_boot_params

	cmpl	$0, %eax

	je	fail
@@ -81,6 +111,10 @@ ENTRY(efi32_stub_entry) 
	leal	efi32_config(%esi), %eax

	add	%esi, 88(%eax)

	pushl	%eax



	movl	%esi, %ebx

	FIXUP_GOT



2:

	call	efi_main

	cmpl	$0, %eax
@@ -190,19 +224,7 @@ relocated: 
	shrl	$2, %ecx

	rep	stosl



/*

 * Adjust our own GOT

 */

	leal	_got(%ebx), %edx

	leal	_egot(%ebx), %ecx

1:

	cmpl	%ecx, %edx

	jae	2f

	addl	%ebx, (%edx)

	addl	$4, %edx

	jmp	1b

2:



	FIXUP_GOT

/*

 * Do the decompression, and jump to the new kernel..

 */
@@ -225,8 +247,12 @@ relocated: 
	xorl	%ebx, %ebx

	jmp	*%eax



#ifdef CONFIG_EFI_STUB

	.data

/* Have we relocated the GOT? */

got_fixed:

	.byte 0



#ifdef CONFIG_EFI_STUB

efi32_config:

	.fill 11,8,0

	.long efi_call_phys

arch/x86/boot/compressed/head_64.S

+41 −15
Original line number Diff line number Diff line
@@ -32,6 +32,33 @@ 
#include <asm/processor-flags.h>

#include <asm/asm-offsets.h>



/*

 * Adjust our own GOT

 *

 * The relocation base must be in %rbx

 *

 * It is safe to call this macro more than once, because in some of the

 * code paths multiple invocations are inevitable, e.g. via the efi*

 * entry points.

 *

 * Relocation is only performed the first time.

 */

.macro FIXUP_GOT

	cmpb	$1, got_fixed(%rip)

	je	2f



	leaq	_got(%rip), %rdx

	leaq	_egot(%rip), %rcx

1:

	cmpq	%rcx, %rdx

	jae	2f

	addq	%rbx, (%rdx)

	addq	$8, %rdx

	jmp	1b

2:

	movb	$1, got_fixed(%rip)

.endm



	__HEAD

	.code32

ENTRY(startup_32)
@@ -252,10 +279,13 @@ ENTRY(efi_pe_entry) 
	subq	$1b, %rbp



	/*

	 * Relocate efi_config->call().

	 * Relocate efi_config->call() and the GOT entries.

	 */

	addq	%rbp, efi64_config+88(%rip)



	movq	%rbp, %rbx

	FIXUP_GOT



	movq	%rax, %rdi

	call	make_boot_params

	cmpq	$0,%rax
@@ -271,10 +301,13 @@ handover_entry: 
	subq	$1b, %rbp



	/*

	 * Relocate efi_config->call().

	 * Relocate efi_config->call() and the GOT entries.

	 */

	movq	efi_config(%rip), %rax

	addq	%rbp, 88(%rax)



	movq	%rbp, %rbx

	FIXUP_GOT

2:

	movq	efi_config(%rip), %rdi

	call	efi_main
@@ -385,18 +418,7 @@ relocated: 
	shrq	$3, %rcx

	rep	stosq



/*

 * Adjust our own GOT

 */

	leaq	_got(%rip), %rdx

	leaq	_egot(%rip), %rcx

1:

	cmpq	%rcx, %rdx

	jae	2f

	addq	%rbx, (%rdx)

	addq	$8, %rdx

	jmp	1b

2:

	FIXUP_GOT



/*

 * Do the decompression, and jump to the new kernel..
@@ -437,6 +459,10 @@ gdt: 
	.quad   0x0000000000000000	/* TS continued */

gdt_end:



/* Have we relocated the GOT? */

got_fixed:

	.byte	0



#ifdef CONFIG_EFI_STUB

efi_config:

	.quad	0

drivers/firmware/efi/libstub/fdt.c

+9 −1
Original line number Diff line number Diff line
@@ -22,7 +22,7 @@ efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt, 
			unsigned long map_size, unsigned long desc_size,

			u32 desc_ver)

{

	int node, prev;

	int node, prev, num_rsv;

	int status;

	u32 fdt_val32;

	u64 fdt_val64;
@@ -73,6 +73,14 @@ efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt, 
		prev = node;

	}



	/*

	 * Delete all memory reserve map entries. When booting via UEFI,

	 * kernel will use the UEFI memory map to find reserved regions.

	 */

	num_rsv = fdt_num_mem_rsv(fdt);

	while (num_rsv-- > 0)

		fdt_del_mem_rsv(fdt, num_rsv);



	node = fdt_subnode_offset(fdt, 0, "chosen");

	if (node < 0) {

		node = fdt_add_subnode(fdt, 0, "chosen");